The Opus E-Masturbator by Mystim has a donut-shaped opening and has a stimulating ribbed structure on the inside. Remove the sleeve from its casing. Electrodes can be attached to the sides for electro-stimulation. This is done by connecting the two push-button adapters on your powerbox to the Opus E-Masturbator. You will sense small electric impulses on both sides of the sleeve when using the powerbox. Use the masturbator in combination with water-based lubricant and optionally with some conducting lubricant such as The Godfather. The E-Masturbator can be cleaned with toy cleaner and lukewarm water after use.